Energy storage enhancement of P(VDF-TrFE-CFE)-based composites with double-shell structured BZCT nanofibers of parallel and orthogonal configurations

Recent research in the development of flexible polymer dielectric materials for the conversion of electrical energy is springing up. A state-of-the-art energy-storage polymer-based composite with the potential of improving the performances (energy-storage density and efficiency) at the low electric field strength is proposed here. The ferroelectric polymer P(VDF-TrFE-CFE) (PVTC) blending with linear polymethyl methacrylate (PMMA) is used as the matrix to ensure higher polarization and lower energy loss. Meanwhile, the inorganic 0.513a(Zr0.2Ti0.8)O-3 -0.5(13a(0.7)Ca(0.3))TiO3 (BZCT) nanofibers work as the filler, and the double transition layers of core-shell structure (Al2O3+SiO2) serve as the interface. Finally, P(VDF-TrFE-CFE)-based composites with double-shell structured BZCT nanofibers of parallel and orthogonal configurations were fabricated. The effects of microstructure information (matrix, filler, interface) together with different configurations (parallel and orthogonal configurations) of BZCT@Al2O3@SiO2 nanofibers on the performances of nanocomposites were systematically and primarily discussed. Importantly, the Orthogonal BZCT@A@S perpendicular to PVTC + PM composite with 3 vol% BZCT@A@S NFs possessed an excellent discharged energy density (similar to 20.1 J/cm(3)) with charge-discharge efficiency of similar to 58.6% at similar to 440 kV/mm; meanwhile, the in-plane thermal conductivity of it reaches to similar to 0.33 W/(m.K). Referring to the experimental findings and simulation results, a mechanism related to rapidly polarized ferroelectric filler was proposed.